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Correlation Losses and Interference Rejection due to Quantization in CBOC Receivers

Sousa, F. ; Nunes, F. ; Leitão, J.

Correlation Losses and Interference Rejection due to Quantization in CBOC Receivers, Proc Institute of Navigation GPS/GNSS Conf., Savannah, United States, Vol. 1, pp. 3234 - 3241, September, 2009.

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Abstract
A joint design activity involving experts from the United
States and Europe recommended an optimized multiplexed
Binary Offset Carrier (BOC) modulation for the modernized
civil GPS signal and the Galileo E1 Open Service signal.
Implementation losses in a GNSS receiver depend on
the sampling rate, the quantization process and the precorrelation bandwidth. These parameters are related and have
a combined effect. This work analyzes: the correlation loss
due to the limited front-end bandwidth; and the signal-tonoise
ratio degradation caused by multi-bit precorrelation
quantization in composite BOC receivers. The required
automatic gain control process to lower quantization loss
is also discussed.